I will not tip $10 to an RMT but $20 if I really want to tip her good massage in some cases. But I normally don't tip a RMT - just like you don't tip a physiotherapist or a chiropodist as they are health professionals. An RMT gets $90 or up for an hour already. Instead, I send Christmas gifts to my regular RMT.
As to semi legit places, I gave $40 to the girls even though no HE followed (on some occasions only). They were so happy - $40 represents my appreciation of their efforts and I consider tips are part of their income. If I don't have that kind of cash and find it too troublesome to go to a bank, I will not go to a spa for a massage.